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Oregon State UniversityColumbia Basin Ag Research Center

Control of downy brome with Cleanwave and grass herbicides

Trial ID: 07-111 Location: CBARC Study Director: Larry Bennett Investigator: Daniel A Ball

General Trial InformationStudy Director: Larry Bennett Title: Research AssistantAffiliation: Columbia Basin Ag. Research CenterPostal Code: 97801 E-mail: [email protected]: Daniel A Ball Title: ProfessorAffiliation: Columbia Basin Ag. Research CenterPostal Code: 97801 E-mail: [email protected]

Crop DescriptionCrop 1: WHEAT Winter wheatVariety: ORCF-101 Planting Date: Oct-5-06Planting Method: JD-9400 drill Rate, Unit: 22 seed/ft2Depth, Unit: 1.5 inRow Spacing, Unit: 10 in

Pest DescriptionPest 1 Type: W Code: BROTE Bromus tectorum Common Name: Downy brome

Pest 2 Type: W Code: AMSLY Amsinckia lycopsoides Common Name: Tarweed fiddleneck

Site and DesignPlot Width, Unit: 9 FTPlot Length, Unit: 30 FTReplications: 4 Study Design: Split-Plot

Soil Description% Sand: 24.6 % OM: 2.9 Texture: Silt loam% Silt: 63.9 pH: 5.6% Clay: 11.4 CEC: 16.5

Application DescriptionA

Application Date: Mar-3-07Time of Day: 1:30 pm Application Method: BroadcastApplication Timing: LAPOWE Application Placement: Surface Air Temperature, Unit: 56 F% Relative Humidity: 70 Wind Velocity, Unit: 1 mph Wind Direction: SE Dew Presence (Y/N): NSoil Temperature, Unit: 44 FSoil Moisture: Wet % Cloud Cover: 100

Crop Stage At Each ApplicationA

Crop 1 Code: WHEAT Stage: 2-3tiller



Trial ID: 07-111 Location: CBARC

Pest Stage At Each ApplicationA

Pest 1 Code, Disc., Scale: BROTE W Stage Majority, Percent: 1 tiller Stage Minimum, Percent: 0 tiller Stage Maximum, Percent: 2 tillerPest 2 Code, Disc., Scale: AMSLY W

Application EquipmentA

Appl. Equipment: Handboom Operating Pressure, Unit: 30 psi Nozzle Type: Flat fan Nozzle Size: XR-8002 Nozzle Spacing, Unit: 18 in Boom Length, Unit: 9 ft Ground Speed, Unit: 3.5 mph Carrier: Water Spray Volume, Unit: 16 gpa Propellant: CO2




Crop Name Wheat Dbrome Dbrome Tarweed WheatPart Rated Crop Weed Weed Weed cropRating Date May-8-07 Mar-28-07 May-8-07 May-8-07 Jul-20-07Rating Data Type Injury Control Control Control Test weightRating Unit % % % % lb/bu

Trt Treatment Form Rate ApplNo. Name Conc Type Prod/A Code

1 Olympus 70 WG 0.9 OZ/A A 0 83 79 63 591 Agral 90 SL 0.25 % V/V A1 Cleanwave 1.25 EC 13.7 FL OZ/A A

2 Olympus 70 WG 0.9 OZ/A A 0 86 86 73 592 Agral 90 SL 0.25 % V/V A2 Cleanwave 1.25 EC 13.7 FL OZ/A A2 MCPA-DMA 4.0 EC 12.6 FL OZ/A A

3 Olympus 70 WG 0.9 OZ/A A 0 85 81 0 583 Agral 90 SL 0.25 % V/V A3 Untreated

4 Olympus Flex 11.3 WG 3.16 OZ/A A 0 89 83 65 584 Agral 90 SL 0.25 % V/V A4 AMS SG A4 Cleanwave 1.25 EC A

5 Olympus Flex 11.3 WG 3.16 OZ/A A 0 88 89 81 585 Agral 90 SL 0.25 % V/V A5 AMS SG 1.52 LB/A A5 Cleanwave 1.25 EC 13.7 FL OZ/A A5 MCPA-DMA 4.0 EC 12.6 FL OZ/A A

6 Olympus Flex 11.3 WG 3.16 OZ/A A 0 91 88 58 586 Agral 90 SL 0.25 % V/V A6 AMS SG 1.52 LB/A A6 Untreated

7 Osprey 4.5 WG 4.76 OZ/A A 0 89 84 72 577 Scoil SL 1 % V/V A7 Cleanwave 1.25 EC 13.7 FL OZ/A A

8 Osprey 4.5 WG 4.76 OZ/A A 0 91 91 85 578 Scoil SL 1 % V/V A8 Cleanwave 1.25 EC 13.7 FL OZ/A A8 MCPA-DMA 4.0 EC 12.6 FL OZ/A A

9 Osprey 4.5 WG 4.76 OZ/A A 0 89 87 76 579 Scoil SL 1 % V/V A9 Untreated

10 Pyroxsulam 7.5 WG 3.57 OZ/A A 0 88 86 93 5810 Agral 90 SL 0.25 % V/V A10 Cleanwave 1.25 EC 13.7 FL OZ/A A




Crop Name Wheat Dbrome Dbrome Tarweed WheatPart Rated Crop Weed Weed Weed cropRating Date May-8-07 Mar-28-07 May-8-07 May-8-07 Jul-20-07Rating Data Type Injury Control Control Control Test weightRating Unit % % % % lb/bu


11 Pyroxsulam 7.5 WG 3.57 OZ/ A 0 92 90 93 5911 Agral 90 SL 0.25 % V/V A11 Cleanwave 1.25 EC 13.7 FL OZ/A A11 MCPA-DMA 4.0 EC 12.6 FL OZ/A A

12 Pyroxsulam 7.5 WG 3.57 OZ/A A 0 89 89 90 5912 Agral 90 SL 0.25 % V/V A12 Untreated

13 Untreated 0 0 0 0 59

LSD (P=.05) NS 8 11 15 NS

Replicate F 0.000 1.647 0.209 1.803 4.042Replicate Prob(F) 1.0000 0.1956 0.8892 0.1760 0.0142Treatment F 0.000 75.973 42.072 36.105 1.127Treatment Prob(F) 1.0000 0.0001 0.0001 0.0001 0.3695




Crop Name WheatPart Rated cropRating Date Jul-20-07Rating Data Type YieldRating Unit bu/A


1 Olympus 70 WG 0.9 OZ/A A 921 Agral 90 SL 0.25 % V/V A1 Cleanwave 1.25 EC 13.7 FL OZ/A A

2 Olympus 70 WG 0.9 OZ/A A 942 Agral 90 SL 0.25 % V/V A2 Cleanwave 1.25 EC 13.7 FL OZ/A A2 MCPA-DMA 4.0 EC 12.6 FL OZ/A A

3 Olympus 70 WG 0.9 OZ/A A 783 Agral 90 SL 0.25 % V/V A3 Untreated

4 Olympus Flex 11.3 WG 3.16 OZ/A A 904 Agral 90 SL 0.25 % V/V A4 AMS SG A4 Cleanwave 1.25 EC A

5 Olympus Flex 11.3 WG 3.16 OZ/A A 975 Agral 90 SL 0.25 % V/V A5 AMS SG 1.52 LB/A A5 Cleanwave 1.25 EC 13.7 FL OZ/A A5 MCPA-DMA 4.0 EC 12.6 FL OZ/A A

6 Olympus Flex 11.3 WG 3.16 OZ/A A 886 Agral 90 SL 0.25 % V/V A6 AMS SG 1.52 LB/A A6 Untreated

7 Osprey 4.5 WG 4.76 OZ/A A 887 Scoil SL 1 % V/V A7 Cleanwave 1.25 EC 13.7 FL OZ/A A

8 Osprey 4.5 WG 4.76 OZ/A A 948 Scoil SL 1 % V/V A8 Cleanwave 1.25 EC 13.7 FL OZ/A A8 MCPA-DMA 4.0 EC 12.6 FL OZ/A A

9 Osprey 4.5 WG 4.76 OZ/A A 909 Scoil SL 1 % V/V A9 Untreated

10 Pyroxsulam 7.5 WG 3.57 OZ/A A 9310 Agral 90 SL 0.25 % V/V A10 Cleanwave 1.25 EC 13.7 FL OZ/A A




Crop Name WheatPart Rated cropRating Date Jul-20-07Rating Data Type YieldRating Unit bu/A


11 Pyroxsulam 7.5 WG 3.57 OZ/A A 9611 Agral 90 SL 0.25 % V/V A11 Cleanwave 1.25 EC 13.7 FL OZ/A A11 MCPA-DMA 4.0 EC 12.6 FL OZ/A A

12 Pyroxsulam 7.5 WG 3.57 OZ/A A 9412 Agral 90 SL 0.25 % V/V A12 Untreated

13 Untreated 56

LSD (P=.05) 8

Replicate F 1.374Replicate Prob(F) 0.2663Treatment F 15.289Treatment Prob(F) 0.0001

Trial Comments

The objective of this trial was to evaluate the effects of the addition of Cleanwave and MCPA to Olympus, Olympus Flex, Osprey and Pyroxsulam for weed control in winter wheat. None of the treatments caused any visual crop injury. Downy brome control ranged from 79-91% on the 5/8/07 rating. All of the treatments with the exception of Olympus by itself controlled tarweed 63-93%. The addition of MCPA to the treatments generally increased control of tarweed 10-15%. The addition of Cleanwave and MCPA did not affect downy brome control. Plots were harvested 7/20/07 with a 'Hege' small plot combine.The harvested grain was further cleaned with an 'Almaco' air cleaner. The grain was thenweighed, test weight determined and yield calculated as bu/A using a standard 60 lb/bu testweight. There were no significant differences in test weights between any of the treatments.The untreated control plots had the lowest yield at 56 bu/A, followed by Olympus by itselfat 78 bu/A. The other treatments averaged 88-96 bu/A.